There are three keys to saving your wallet while still in school: make money, save money and be smart with your money.

Make Money

Your class schedule may make “regular” jobs hard to find, but earning supplemental income doesn’t need to be an obstacle. There are 53 million freelance workers in the U.S. today, according to Freelancers Union. You can join them, while still in school.

First take stock of what you have to offer.

• Are you crafty? Turn your fun hobby into income on Etsy or similar sites.
• Don’t forget to consider the standard-bearers of independent work. The powerhouse Amway is built on the work of people working for themselves. You get the name recognition of an international company, with the self-directed flexibility of the gig economy.
• Whatever your talent, consider offering it up on a platform like Fiverr. Everything from singing a jingle to researching a domain name nets a “fiver,” hence the site’s name.
• TaskRabbit offers a different model. Check to see if your city is listed. If so, you can apply to become a tasker. Jobs range to standing in line (seriously) to delivering groceries to assembling IKEA furniture.
• If you have a car, there’s Uber if you’re willing to drive people around, and Getaround if you’re willing to rent your vehicle. Make your assets work for you. (If the car is actually in your parent’s name, you probably need to discuss it with them first.)
• Does your school have a psychology department? Check to see if there are trials, experiments or testing going on and whether they pay. Do it for science (or for twenty bucks).
• There is a constant need for plasma. And it usually pays somewhere between $25 and $50.

Save Money

• You most likely have access to Wi-Fi on campus, so take full advantage of what your school offers technology-wise. If you have sufficient access to the Internet for free, why pay for it at home too?
• You may need a cellphone, but you can let cable go. Check out music and DVDs from the library instead.
• Textbooks shred your wallet, so be on the look out for a good source of used textbooks. Then, sell yours when the semester ends. Another option is renting those tomes through services like Bookrenter.
• Many campus social events feature food, so attend and eat for free.
• Always keep your student ID handy. Discounts at museums, movies and transportation all add up.
• Many big companies offer students special deals that no one else can get. For example, Amazon has Amazon Student.

Be Smart With Your Money

When evaluating what kind of jobs to take, keep in mind the ratio of your time and energy spent to the dollars earned. If your grades suffer because you’re too busy on Fiverr doing five-dollar gigs, it’s time to rethink your position.

It won’t do you any good to save money by buying an old textbook if the content has changed too much. Do some research. Very often there is virtually no difference, but it’s better to be safe than sorry.

Keep in mind the skills you want to build on for the future. And finally, don’t sell yourself short.